Fillers

Our low-silica and low-impurity dolomite is an ideal asphalt filler.

Mill Creek’s filler grade dolomite is used as a low silica filler for asphaltic, bituminous, and cementatious based materials. The main market is asphalt shingles where it serves to reduce the cost of asphalt and impart strength, tear resistance, and hardness to shingles. In addition, Mill Creek’s stone matrix asphalt (“SMA”) mineral fillers meet the American Association of State Highway and Transportation Officials specifications for dense-graded asphaltic mixtures. The plant produces five filler grade products, each of which has a uniform particle size distribution and consistent chemical composition.